Skeleton iron tower



(No Model.)

J. s. ADAMS.

. n SKELBTON IRON TOWBM No. 297,336. m Patented Apr. 22, 1884.

'Unire rares JOHN S. ADAMS, OF ELGIN, ILLINOIS, ASSIGNOR rIO THE DETROITIRON I TOVER COMPANY, OF DETROIT, MICHIGAN.

SKELETON IRON TOWER.

SPECIFICATION forming part of Letters Patent No. 297,336, dated April22, 1884.

y Application tiled 'May 31, 18E3. Renewed March lI, 1834. (No model.)

exact description thereof, reference being had,

to the accompanying drawings, and to the letters ot' reference markedtheron, which form a part of this specification.

This invention relates to interior trussing for quadrilateral skeletoniron towers, and has reference to a form ot' interior trussing for suchtowers by which the desired bracing efrods and flexibly bolted together.

i'ect is obtained, and which at the same time allows a central passagefor an interior elevator-eab or lamp-carriage.

In the accompanying drawings, Figure I is a horizontal section of aquadrangular skeleton iron tower provided with my improvement. Fig. 2 isa detail view.

A A are the upriglits ot' the tower, and B B are straight horizontalgirts connecting said upriglits in the planes ofthe tower sides.

O C are ties connecting diagonally-opposite uprights A,each pair ofuprights being preferbly connected by two ofthe said ties O.

O' O are ties which join the ties O with the intermediate toweruprights, A, and give proper tension to said ties O.

The novel feature of' this invention consists in the bent or deflectedarrangement and construction ot' the ties O, by which the centralpassage, D, is afforded, and which is accomplished by means of the tiesO, connected and operating as shown. The ties O are usually made in twoparts, c c, centrally joined to each other and to the ties C by means ofa coupling. O2, which may properly consist. of clevises or eyesscrew-threaded to the several tie- The outer extremities ot' the ties Oand O are preferably joined to the tower-uprights by means of thetwo-part clamping-plates C3, one part, c', affording attachment for theseveral ties, as shown, being secured tothe extremities'of the ties andlocated on the inside of the uprights, and the second, c?, extendingoutside of the uprights, and being bolted or otherwise secured to thepart c.

Instead ofthe two-part clamping-plates C3, eyes or sleeves havingsuitable lugs for the attachment of the ties, or tapped to receive theirthreaded ends, may be applied to the tower-uprights in the process ot'erection, or to the couplings which unite the girts to the uprights.

I donot limit myselfto any particular means of connecting` the ties witheach other or with the uprights or couplings, the distinctive featureofthe invention being bent t-ies connecting diagonally opposite uprightsof the tower, bent from a direct course between said uprights, and heldin their bent position by means of the short ties O', connecting thembetween their ends with the intermediate uprights of the tower. By thismeans, as is clearly shown in the drawings, a central passage isafforded in the tower for the accom modation ot' an elevator orlamp-carriage, which may be suspended therein in any ofthe ordinary orpreferred modes.

Vhen the diagonally-opposite uprights are connected by two ties C,similarly arranged on opposite sides of the center or axis of the tower,as shown, the bracing effect of the diagonals is as perfect as though asingle diagonal bra-ce or tie of equal strength were drawn directly fromupright to upright. An excellent bracing effect is, however, obtained bythe use of two ties O and a corresponding number of detlecting-ties O',instead of four ot' each, as shown in the drawing, and such constructionis intended to be embraced in the first claim hereto appended.

I claim as my invention- 1. In a quadrangular tower, the combination,with the uprights, ofthe diagonal ties O and the ties G', the former ofsaid ties being centrally deected, and the latter operating to hold theformer under proper tension in such deflected position, substantially asdescribed.

2. In the quadrangular tower, the combination, with the uprights, of thefour diagonal ties' C O, connected in pairs to the diagonallyoppositeuprights, and the ties C O', connected severally with the ties O andwith the intermediate uprights, whereby the said ties O are heldcentrally deiiected at opposite sides of the tower-axis, substantiallyas described.

In testimony that I claim the foregoing as my invention I affix mysignature :in presence of two witnesses.

Witnesses: JOHN S. ADAMS..

GEO. R; DUNHAM, JAMEs TODD.

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